Brake mechanism for automatic instruments.



F. CHENEY.

BRAKE MECHANISM FOR AUTOMATIC NSTRUMENTS. APP'LlcATloN man 1AN.12,19|2.RENEwED MAY 5,1915.

1,236,542.. PatentedAug.14,1917.

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FOREST CHENEY, OF JAMESTOIVN, NEW YORK, A-SSIGNOR, BY MESNE ASSIGNMENTS,TO

CHENEY TALKING MACHINE cor/IP ANY, or CHICAGO, ILLINOIS, Af conronA'rIoNor ILLINOIS.

BRAKE MEGHANISM FOR AUTOMATIC INSTRUMENTS.

i Application filed January 1,2, 1912, Serial No. 670,933.

To all whom it may concern:

Be it known that I, FOREST CHENEY, a citizen of the United States,residing at Jamestown, in the county of Chautauqua and State of NewYork, have invented certain new and useful Improvementsin BrakeMechanism for Automatic Instruments, of which the following, taken inconnection with the accompanying drawings, is a specilication.

The invention relates to controlling devices for automatic instruments;and the object of the improvement is to provide simple and accuratemetronomic mechanism for controlling and regulating the tempo and pitchof musical records played by automatic musicall instruments.

The value of the musical composition depends entirely upon the manner inwhich itl will be able to set the speed of the rotating disk or cylinderin exact accord with the proper tempo, thus causing the automaticmusical instrument to reproduce the composition in the same tempo andpitch in which the original record was made. The metrometer controlsthe, rotating speed of the disk or cylinder upon which the recordisplayed and by means of a dial and indicator the exact number ofrotations per minute may be determined. This correct number of rotationsper minute is placed upon the disk or cylinder and will enable anyoperator to know at once the correct tempo and pitch, for the tempo andpitch are controlled by the speed of rotation.

The invention consists in the construction and arrangement of themetronomic parts as described in this specification and shown in thedrawings and pointedy out in the claims.

In the drawings, Figure 1 is a plan view of the power mechanism for anautomatic instrument showing metronomic mechanism.attached thereto. Fig.2 is a sectional view at line X X in Fig. 1; Fig. 3 is a sectional viewat line Y Y in Fig. l; and Fig. 4 isa sectional view at line Z Z in Fig.1 showing views of the metronomic or Specification of Letters Patent.

Patented Aug. 14, 1917. Renewed `May 5, 1915. Serial No. 26,137.

controlling mechanism for the power mechamsm of the instrument. Fig. 5is a plan view of the adjusting screw and the dial of the metrometer.Fig. 6 is a detail of the angular guide plate for adjustino the cam.

Like numerals of reference refer to corresponding parts in the severalviews.

The numeral 10 designates the top plate of the instrument which hasattached toits under side the plate 11 with bracket 11 for supportingone end of the shafts of the power or driving mechanism and themetronomic mechanism. Plate 11 has a second bracket 12 at a spaceddistance from bracket 11 to hold the opposite ends of the shafts.

The main driving shaft 13 has the coil springs 14 attached thereon and adriving gear 15 which meshes in gear 16 on short shaft 17 on plate 11,which shaft 17 also has the gear 18 keyed thereon which meshes in gear19 on short shaft 2O on platek 11., The shaft 20 also has keyed thereonthe gear 2l which meshes in gear 22 on shaft 23.

The shaft 23 has gearl 24 thereon which meshes in gear 25, therebyturning gear 26 "which meshes in worm 27 on shaft 2 8. Ther at one endand has attached to its4 opposite end the felt blockor brake shoe 32.VAThe spring 31 normally holds the felt brake shoe. 32 away from the edge44 of the wheel 30. A cam 33 is mounted on shaft 34 and bears againstthe spring 31 pressing the brake shoe 32 against the beveled edge 44 ofthe balance wheel 30. The shaft 34 extends up through plates l0 and 11and is turned to form an indicator 35 or has an indicator 35, attachedthereto, which indicator extends to, scale or dial 36; the other end ofthe. shaft 34 is pivotally mounted in the end of angular lever plate 37.The plate 3,7 is pivotally attached at 38 on bracket 11 about midway ofits length so that the two ends of the` lever may move reciprocally backand forth on the pivotal mounting. The pivotal movement of the plate 37is only for the` exact adjustment of cam 33, which adjustment isattained by means of a screw 39 which has a cone-shaped end 40 and ismounted through plate l0 and a projecting luo 4l on bracket 11. IIhecone-shaped end Ll0 bears against a curved opening l2 in the side ofbracket 11 on one side and against a curved opening 43 in the side ofangular plate 37. It is apparent that screw 39 may thus adjusttheposition of plate 37 with great accuracy as the beveled end l() of screw39 presses down between bracket 11 and plate 37, or is withdrawn frombetween said parts, thereby moving the end of plate 37 and the cam 33nearer to or farther from spring 31.

It is now apparent that the pointer may be turned to any point on thedial 36 desired by actuation of the screw 39 and that a predeterminedpressure will be placed upon the balance wheel 30 thereby controllingthe governor and causing it -to move at a predetermined speed, and thatsaid speed may be determined and adjusted with great accuracy by meansof the screw 39 and plate 37.

On the dial in Fig. 5 the pointer 35 stands at 70 which means that themetrometer will control the rotating speed of the disk or cylinder uponwhich the record is played so that it will rotate 70 times per minute. Acomposition which should be played in that tempo would have the numeral7 O placed on the disk or cylinder and the operator will have only toturn the pointer 35 to the numeral 70 on the dial in order able drivingmechanism, a governor to have the composition correctly rendered, bothas to tempo and pitch by the automatic instrument. Should the correctspeed of the original record be 50 revolutions of the disk or cylinderper minute, the pointer should be turned as shown in dotted line on thedial, thereby insuring the correct rendering of the composition in thesame tempo and pitch in which the original record was made.`

I claim as new:

l. In a device of the class described, sulitor said driving mechanism, abalance wheel on said governor, a spring pressing away from said balancewheel, a brake shoe on said spring, a cam to press said brake shoeagainst said balance wheel, a pointerto turn said cam, a dial for saidpointer, and mechanism for graduating the adjustment of said cam withaccuracy. 4

2. In a device of the class described, driving mechanism, a governor forsaid driving mechanism comprising a balance wheel, a pivotally mountedarm, a brake shoe mount ed independently of said arm and adapted to bearagainst said balance wheel, means carried on one end of said arm forpressing said brakeshoe against said balance wheel with a predeterminedpressure, and means coperating with the opposite end of said arm toadjust said means for pressing said brake shoe against said balancewheel.

3. In a device of the class described, power mechanism, a governor forsaid power mechanism, a balance wheel on said governor, a springpressing awayV from said balance wheel, a brake shoe on. said spring, acam to press said spring and brake shoe against said balance wheel, apointer attached to said cam for turning the same, a dial for saidpointer to determine the speed of said mechanism, a plate pivotallymounted and supporting said cam and pointer on one end, and a screw witha cone-shaped end between the other end of said plate and the supportingframe to graduate the adjustment ofV said cam in its relation to saidbrake shoe. Y

4. In a device of the class described, a driving mechanism, a governorfor said driving mechanism, abalance wheel on said governor, a springpressing away from the balance wheel, a brake shoe on the end of saidspring, and means for pressing the brake shoe against said balance wheelwith an adjustable predetermined pressure.

5. In a device of the class described, drive Y ing mechanism, a governorfor said driving mechanism, a disk on said governor, a brake shoe tocoact Vwith said disk, means unattached to and contacting with saidbrake shoe to adjust the pressure of the brake shoe on said disk, andvindependent adjustingV means to vary the effect ofvsaid first-namedmeans. Y Y

6. In a device of the class described, driving mechanism, a governor forsaid driving mechanism comprising a balance wheel, a spring` pressingaway from said balance wheel, a brake shoe carried by said spring, and acam to press said brake shoeagainst said balance wheel.

7. In a device of the class described, drivance wheel, a spring by whichsaid brake shoe is carried, adjustable means coacting with said springto vary the pressure of the brake shoe on said balance wheel, `andseparately controlled means tograduate the adjustment of the adjustablemeans. Y

9. In a device of the class described, driving mechanism, a governor forsaid driving mechanism, a balance wheel on said governor, -a Abrake shoeadapted tocoact with the balance wheel, a spring by which the brake shoeis carried, a cam coacting with said spring to vary the pressure of thebrake shoe on said balance wheel, a shaft upon which the cam is mounted,and means to adjust the position of said shaft to regulate theadjustment of the cam.

l0. In a device of the class described, driving mechanism, a governorfor said driving mechanism, a balance wheel on said governor, a brakeshoe adapted to coact with the balance wheel, a cam adapted to presssaid brake shoe against the balance wheel, means to rotate said cam, andmeans to m`ove the cam bodily toward and away from the brake shoe.

11. In a device of the class described, driving mechanism, a governorfor said driving mechanism, a balance wheel on said governor, a springpressing away from said hala-nce wheel, a brake shoe on said spring, acam to press the brake shoe against the balance wheel, a combined handleand pointer to rotate the cam, and a dial over which the handle andpointer move.

12. In a device of the class described, a balance wheel, a brake shoeadapted to coact with said balance wheel, means tending normally to movesaid brake shoe out of contact with said balance wheel, adjustable meansto press said brake shoe against said balance wheel in opposition to theaction of said iirst named means, and independent adjusting means tovary the eii'ect of said second named means.

13. In a device of the class described, a rotatively mounted disk, abrake shoe adapted to co-act with said disk, an angular 1ever mountedadjacent said disk, means carried by one arm of said lever for pressingsaid brake shoe against said disk, a fixed support adjacent the otherarm of said lever, and adjustable means interposed between said fixedsupport and said other arm to vary the position of said lirst named armwith respect to said disk.

In testimony whereof I have aiiXed my signature in the presence of twowitnesses.

FOREST CHENEY.

Witnesses:

A. W. Kn'rrnn, H. U. HARRIS.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

